A/C System, Replacing Components

A/C Refrigerant System (R-134a), Replacing Components
- Replacement A/C compressors, evaporators and condensers supplied by the Parts Dept. are filled with nitrogen. If gas does not escape when component is first opened, the component may be faulty; do not install.
- Install new replacement accumulator immediately after opening to prevent moisture contamination of desiccant.
- Always plug open refrigerant line connections to prevent dirt and moisture contamination.
- Always replace restrictor whenever system is discharged due to a leaking component.
- Dispose of contaminated refrigerant (PAG) oil following laws governing hazardous waste disposal. Do not combine PAG oil with any other old oils such as engine oil or transmission fluid.

If system is discharged as the result of a leaking component (except compressor):
- Remove A/C compressor.
- Remove leaking component.
- Plug all open refrigerant line connections to prevent dirt and moisture contamination.
- Blow through component with compressed air and collect oil that runs out.
- Add same amount of new refrigerant (PAG) oil to new component plus amount listed below:
- Evaporator: 20 cc (0.7 fl oz)
- Accumulator: 30 cc (1.0 fl oz)
- Condenser: 10 cc (0.3 fl oz)
- Refrigerant line/hose: 10 cc (0.3 fl oz)
- Install new component.
- Remove compressor oil drain plug, drain refrigerant oil from compressor and measure amount.


NOTE:
- Rotate compressor by hand to speed up oil draining process.
- Dispose of used refrigerant oil following laws governing hazardous waste disposal.


CAUTION!
In order to ensure lubrication during initial start-up, add a minimum of 80 cc (2.7 oz) of fresh refrigerant (PAG) oil to A/C compressor.


- Refill compressor with 80 cc (2.7 oz) of fresh refrigerant oil.
- Install oil drain plug.

- If total amount of refrigerant oil drained from old compressor was greater than 80 cc (2.7 oz):
- Subtract 80 cc (2.7 oz) (amount of new oil that was added to compressor) from total amount.
- Add resulting amount of fresh refrigerant oil to either evaporator or accumulator.

Example:
100 cc (amount of oil drained from old compressor)
-80 cc (amount of fresh oil added to new compressor)
20 cc (amount of fresh oil to be added to evaporator or accumulator)

- Install A/C compressor.
- Evacuate and recharge refrigerant system.
- Manually rotate A/C compressor 10 rotations before operating system to prevent compressor damage.


NOTE: Some refrigerant/recovery/recycling/recharging equipment has provisions for adding refrigerant (PAG) oil during system recharge. If using this method for adding oil, follow all refrigerant/recovery/recycling/recharging equipment manufacturer's instructions.


If system is leaking as the result of a damaged or faulty part (except compressor), but system is still charged:
- Discharge refrigerant system.
- Remove faulty component and plug all open line connections.
- Blow through component with compressed air and collect oil that runs out.
- Add same amount of new refrigerant (PAG) oil to new component plus amount listed below:
- Evaporator: 20 cc (0.7 fl oz)
- Accumulator: 30 cc (1.0 fl oz)
- Condenser: 10 cc (0.3 fl oz)
- Refrigerant line/hose: 10 cc (0.3 fl oz)
- Install new component.
- Evacuate and recharge refrigerant system.